Finding the Fourth Proportional to 868.32, 1,300.46 and 684.45

Step by Step Solution

1. Step 1: Write the proportion equation
   868.32 : 1,300.46 = 684.45 : x
2. Step 2: Convert to fraction form
   868.32/1,300.46 = 684.45/x
3. Step 3: Cross multiply
   868.32x = 1,300.46 × 684.45
4. Step 4: Simplify right side
   868.32x = 890,096.42
5. Step 5: Solve for x
   x = 890,096.42/868.32
6. Step 6: Final answer
   x = 1,025.08